<template>
  <div>
    <p v-text="str"></p>
    <p v-html="str"></p>
    <p v-html="str">{{ 1 + 2 }}</p>
  </div>
</template>

<script>
export default {
  data() {
    return {
      str: "<span>xxxxxxx阿啦啦啦</span>"
    }
  }
}
</script>